Hadithcore
Sahih Muslim, 1651 f
sahih

Tamim b. Tarafa reported:

I heard 'Adi b. Hatim say that a person asked that and then narrated (the hadith) like one (mentioned above), but he made this addition:" Here are four hundred (dirhams) for you out of my gift."

حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا بَهْزٌ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا سِمَاكُ بْنُ حَرْبٍ، قَالَ سَمِعْتُ تَمِيمَ بْنَ طَرَفَةَ، قَالَ سَمِعْتُ عَدِيَّ بْنَ حَاتِمٍ، أَنَّ رَجُلاً، سَأَلَهُ فَذَكَرَ مِثْلَهُ وَزَادَ وَلَكَ أَرْبَعُمِائَةٍ فِي عَطَائِي ‏.‏

References2 variants
In-Book Reference
Book 27, Hadith 27
USC-MSA web (English) reference
Book 15, Hadith 4061 (deprecated numbering scheme)